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A normal abundance of faint satellites in the fossil group NGC 6482
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| Published in: | Astronomy and astrophysics volume:559; year:2013; month:11; elocationid:A76; pages:1-14; 559(2013) vom: Nov., Artikel-ID A76, Seite 1-14; extent:14 |
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| Authors and Corporations: | , , , , , |
| Other Authors: | Mieske, S. [Author] • Sánchez-Janssen, R. [Author] • Hilker, M. [Author] • Lisker, Thorsten 1978- [Author] • Tanaka, M. [Author] |
| Type of Resource: | E-Book Component Part |
| Language: | English |
| published: |
18 November 2013
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| Series: |
Astronomy and astrophysics, 559(2013) vom: Nov., Artikel-ID A76, Seite 1-14
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| Source: | Verbunddaten SWB Lizenzfreie Online-Ressourcen |
| ISSN: |
1432-0746
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| Summary: | A fossil group is considered the end product in a galaxy group’s evolution. It is a massive central galaxy that dominates the luminosity budget of the group, and is the outcome of efficient merging between intermediate-luminosity members. Little is known, however, about the faint satellite systems of fossil groups. Here we present a Subaru/Suprime-Cam wide-field, deep imaging study in the B− and R−bands of the nearest fossil group NGC 6482 (Mtot ~ 4 × 1012 M⊙), covering the virial radius out to 310 kpc. We performed detailed completeness estimations and selected group member candidates by a combination of automated object detection and visual inspection. A fiducial sample of 48 member candidates down to MR ~ −10.5 mag is detected, making this study the deepest of a fossil group to now. We investigate the photometric scaling relations, the color-magnitude relation, and the luminosity function of our galaxy sample. We find evidence of recent and ongoing merger events among bright group galaxies. The color-magnitude relation is comparable to that of nearby galaxy clusters, and it exhibits significant scatter at the faintest luminosities. The completeness-corrected luminosity function is dominated by early-type dwarfs and is characterized by a faint end slope α = −1.32 ± 0.05. We conclude that the NGC 6482 fossil group shows photometric properties consistent with those of regular galaxy clusters and groups, including a normal abundance of faint satellites. |
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| Item Description: | Gesehen am 02.03.2022 |
| Physical Description: | 14 |
| ISSN: |
1432-0746
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| DOI: | 10.1051/0004-6361/201321288 |